I was flying on the beach today. I live near practically empty beaches so safe and easy to fly. Was up about 80m and a microlight came out of nowhere. He was really low, thankfully he came above me and my p3p was way out over the water but it could have been close. I fly under 400 foot but so do these guys by the look of it. Do these micro lights need atc clearance? Are they allowed so low?